优化购物车页面加价购和赠品栏样式。code review by XWG

@@ -141,7 +141,7 @@
     }
 
     .freebie-and-advance-buy {
-        padding: 20rem / $pxConvertRem;
+        padding: 20rem / $pxConvertRem 0;
         font-size: 24rem / $pxConvertRem;
         border-top: 1px solid #e0e0e0;
         margin-bottom: 30rem / $pxConvertRem;
@@ -152,7 +152,6 @@
             line-height: 80rem / $pxConvertRem;
             margin-bottom: 10rem / $pxConvertRem;
             padding: 0 20rem / $pxConvertRem;
-            background: #f1f1f1;
 
             &:last-child {
                 margin-bottom: 0;
@@ -162,6 +161,22 @@
                 float: right;
                 width: 100%;
             }
+
+            .under-line {
+                display: inline-block;
+                height: 1px;
+                width: 91%;
+                position: absolute;
+                left: 9%;
+                background-color: #f1f1f1;
+            }
+
+        }
+
+        > li:first-child {
+            .under-line {
+                display: none;
+            }
         }
 
         .count {

@@ -22,6 +22,7 @@
                     <span class="iconfont icon-right-arrow">&#xe614;</span>
                     <span class="count">{{giftCount}}</span>
                 </a>
+                <span class="under-line"></span>
             </li>
         {{/if}}
         {{#if advanceBuy}}
@@ -32,6 +33,7 @@
                     <span class="iconfont icon-right-arrow">&#xe614;</span>
                     <span class="count">{{advanceBuyCount}}</span>
                 </a>
+                <span class="under-line"></span>
             </li>
         {{/if}}
     </ul>